use config::{Config, Environment, Value};
use std::collections::HashMap;
use std::io::prelude::*;
use std::fs::File;
use std::fs::OpenOptions;
use std::path::Path;
use toml::value;
fn main()
{
	let mut mcu_lookup_table = Config::new();
	let mut make_manifest: Config = Config::new();
	mcu_lookup_table.merge(config::File::with_name("\
		/storage/Shared/Documents/Projects/ePenguin/\
		ePenguin-Software-Framework/arch/mcu-lookup.toml")).unwrap();
	make_manifest.merge(config::File::with_name("\
		/storage/Shared/Documents/Projects/ePenguin/\
		ePenguin-Software-Framework/arch/make-manifest.toml")).unwrap();
	let mut _table_name = mcu_lookup_table.get_str("make.mcu.samd21j18a").unwrap();
	let mut table_head = &_table_name[0.._table_name.len()];
	let mut makefile: HashMap<String, config::Value> = HashMap::new();
	let mut b_quit: bool = false;
	loop
	{
		let mut _active_table = make_manifest.get_table(&table_head).unwrap();
		for (name, val) in _active_table
		{
			match val.clone().into_table()
			{
				Err(_e) =>
				{
					if !makefile.contains_key(&name)
					{
						makefile.insert(name, val);
					}
					else
					{
						let mut newval = val.clone().into_array().unwrap();
						let mut newvec = makefile.get_key_value(&name).unwrap().1.clone().into_array().unwrap();
						newvec.append(&mut newval);
						makefile.insert(name, config::Value::from(newvec));
					}
				}
				Ok(_v) => {}
			}
		}
		match table_head.rfind('.')
		{
			None => b_quit = true,
			Some(v) => table_head = &table_head[0..v],
		}
		if b_quit
		{
			break;
		}
	}

	// for (key_id, val) in &makefile
	// {
	// 	println!("\n{}: {:?}", key_id, val);
	// }
	gen_makefile(&makefile);
}

fn gen_makefile(mkfile: &HashMap<String, config::Value>) -> bool
{
	// If the Makefile already exists, trash it
	if Path::new("Makefile").exists()
	{
		std::fs::remove_file("Makefile");
	}

	// Make our Makefile, set it to append mode
	File::create("Makefile").unwrap();
	let mut app_file = OpenOptions::new()
		.write(true)
		.append(true)
		.open("Makefile")
		.unwrap();
	//
	writeln!(app_file, "# ePenguin Generated Variables").unwrap();

	// Get our knowns out of the way
	match mkfile.get("PROJECT_NAME")
	{
		None =>
		{
			println!("PROJECT_NAME not found");
		}
		Some(v) =>
		{
			write!(app_file, "PROJECT_NAME=").unwrap();
			writeln!(app_file, "{}", v.to_string()).unwrap();
		},
	}

	match mkfile.get("TOOLCHAIN")
	{
		None =>
		{
			println!("TOOLCHAIN Not found");
		}
		Some(v) =>
		{
			write!(app_file, "TOOLCHAIN=").unwrap();
			writeln!(app_file, "{}", v.to_string()).unwrap();
		},
	}
	match mkfile.get("CC")
	{
		None =>
		{
			println!("CC Not found");
		}
		Some(v) =>
		{
			write!(app_file, "CC=").unwrap();
			writeln!(app_file, "{}", v.to_string()).unwrap();
		},
	}
	match mkfile.get("CXX")
	{
		None =>
		{
			println!("CXX Not found");
		}
		Some(v) =>
		{
			write!(app_file, "CXX=").unwrap();
			writeln!(app_file, "{}", v.to_string()).unwrap();
		},
	}
	match mkfile.get("OBJCOPY")
	{
		None =>
		{
			println!("OBJCOPY Not found");
		}
		Some(v) =>
		{
			write!(app_file, "OBJCOPY=").unwrap();
			writeln!(app_file, "{}", v.to_string()).unwrap();
		},
	}
	match mkfile.get("OBJDUMP")
	{
		None =>
		{
			println!("OBJDUMP Not found");
		}
		Some(v) =>
		{
			write!(app_file, "OBJDUMP=").unwrap();
			writeln!(app_file, "{}", v.to_string()).unwrap();
		},
	}
	match mkfile.get("GDB")
	{
		None =>
		{
			println!("GDB Not found");
		}
		Some(v) =>
		{
			write!(app_file, "GDB=").unwrap();
			writeln!(app_file, "{}", v.to_string()).unwrap();
		},
	}
	match mkfile.get("SIZE")
	{
		None =>
		{
			println!("SIZE Not found");
		}
		Some(v) =>
		{
			write!(app_file, "SIZE=").unwrap();
			writeln!(app_file, "{}", v.to_string()).unwrap();
		},
	}
	match mkfile.get("AS")
	{
		None =>
		{
			println!("AS Not found");
		}
		Some(v) =>
		{
			write!(app_file, "AS=").unwrap();
			writeln!(app_file, "{}", v.to_string()).unwrap();
		},
	}
	writeln!(app_file, "\n").unwrap();

	// MCU Specifics now
	match mkfile.get("MCPU")
	{
		None =>
		{
			println!("MCPU Not found");
		}
		Some(v) =>
		{
			write!(app_file, "MCPU=").unwrap();
			writeln!(app_file, "{}", v.to_string()).unwrap();
		},
	}
	match mkfile.get("MCU")
	{
		None =>
		{
			println!("MCU Not found");
		}
		Some(v) =>
		{
			write!(app_file, "MCU=").unwrap();
			writeln!(app_file, "{}", v.to_string()).unwrap();
		},
	}
	match mkfile.get("LD_PATH")
	{
		None =>
		{
			println!("LD_PATH Not found");
		}
		Some(v) =>
		{
			write!(app_file, "LD_PATH=").unwrap();
			writeln!(app_file, "{}", v.to_string()).unwrap();
		},
	}
	match mkfile.get("LD_SCRIPT")
	{
		None =>
		{
			println!("LD_SCRIPT Not found");
		}
		Some(v) =>
		{
			write!(app_file, "LD_SCRIPT=").unwrap();
			writeln!(app_file, "{}", v.to_string()).unwrap();
		},
	}

	writeln!(app_file, "\n").unwrap();

	// CFLAGS
	match mkfile.get("CFLAGS")
	{
		None =>
		{
			println!("CFLAGS Not found");
		}
		Some(v) =>
		{
			write!(app_file, "CFLAGS=").unwrap();
			for cflag in v.clone().into_array().unwrap()
			{
				writeln!(app_file, " \\").unwrap();
				write!(app_file, "{}", cflag).unwrap();
			}
		},
	}
	writeln!(app_file, "\n").unwrap();
	// ELF FLAGS
	match mkfile.get("ELF_FLAGS")
	{
		None =>
		{
			println!("ELF_FLAGS Not found");
		}
		Some(v) =>
		{
			write!(app_file, "ELF_FLAGS=").unwrap();
			for cflag in v.clone().into_array().unwrap()
			{
				writeln!(app_file, " \\").unwrap();
				write!(app_file, "{}", cflag).unwrap();
			}
		},
	}
	writeln!(app_file, "\n").unwrap();
	// HEX FLAGS
	match mkfile.get("HEX_FLAGS")
	{
		None =>
		{
			println!("HEX_FLAGS Not found");
		}
		Some(v) =>
		{
			write!(app_file, "HEX_FLAGS=").unwrap();
			for cflag in v.clone().into_array().unwrap()
			{
				writeln!(app_file, " \\").unwrap();
				write!(app_file, "{}", cflag).unwrap();
			}
		},
	}

	writeln!(app_file, "\n").unwrap();
	match mkfile.get("EEP_FLAGS")
	{
		None =>
		{
			println!("EEP_FLAGS Not found");
		}
		Some(v) =>
		{
			write!(app_file, "EEP_FLAGS=").unwrap();
			for cflag in v.clone().into_array().unwrap()
			{
				writeln!(app_file, " \\").unwrap();
				write!(app_file, "{}", cflag).unwrap();
			}
		},
	}

	writeln!(app_file, "\n").unwrap();
	// Write SystemRoot config stuff for cross compatibility
	let sysroot: String = String::from("ifdef SystemRoot
SHELL = cmd.exe\n\
MK_DIR = mkdir\n\
else\n\
ifeq ($(shell uname), Linux)\n\
MK_DIR = mkdir -p\n\
endif\n\
\n\
ifeq ($(shell uname | cut -d _ -f 1), CYGWIN)\n\
MK_DIR = mkdir -p\n\
endif\n\
\n\
ifeq ($(shell uname | cut -d _ -f 1), MINGW32)\n\
MK_DIR = mkdir -p\n\
endif\n\
\n\
ifeq ($(shell uname | cut -d _ -f 1), MINGW64)\n\
MK_DIR = mkdir -p\n\
endif\n\
\n\
ifeq ($(shell uname | cut -d _ -f 1), DARWIN)\n\
MK_DIR = mkdir -p\n\
endif\n\
endif\n\
");

	writeln!(app_file, "{}", sysroot).unwrap();
	match mkfile.get("SUB_DIRS")
	{
		None =>
		{
			println!("SUB_DIRS Not found");
		}
		Some(v) =>
		{
			write!(app_file, "SUB_DIRS+=").unwrap();
			for cflag in v.clone().into_array().unwrap()
			{
				writeln!(app_file, " \\").unwrap();
				write!(app_file, "{}", cflag).unwrap();
			}
		},
	}

	writeln!(app_file, "\n").unwrap();
	match mkfile.get("OBJS")
	{
		None =>
		{
			println!("OBJS Not found");
		}
		Some(v) =>
		{
			write!(app_file, "OBJS+=").unwrap();
			for cflag in v.clone().into_array().unwrap()
			{
				writeln!(app_file, " \\").unwrap();
				write!(app_file, "{}", cflag).unwrap();
			}
		},
	}

	writeln!(app_file, "\n").unwrap();
	match mkfile.get("OBJS_AS_ARGS")
	{
		None =>
		{
			println!("OBJS_AS_ARGS Not found");
		}
		Some(v) =>
		{
			write!(app_file, "OBJS_AS_ARGS+=").unwrap();
			for cflag in v.clone().into_array().unwrap()
			{
				writeln!(app_file, " \\").unwrap();
				write!(app_file, "{}", cflag).unwrap();
			}
		},
	}

	writeln!(app_file, "\n").unwrap();
	match mkfile.get("DIR_INCLUDES")
	{
		None =>
		{
			println!("DIR_INCLUDES Not found");
		}
		Some(v) =>
		{
			write!(app_file, "DIR_INCLUDES+=").unwrap();
			for cflag in v.clone().into_array().unwrap()
			{
				writeln!(app_file, " \\").unwrap();
				write!(app_file, "{}", cflag).unwrap();
			}
		},
	}

	write!(app_file, "\n\n").unwrap();
	match mkfile.get("DEPS")
	{
		None =>
		{
			println!("DEPS Not found");
		}
		Some(v) =>
		{
			write!(app_file, "DEPS:=").unwrap();
			writeln!(app_file, "{}", v.to_string()).unwrap();
		},
	}

	write!(app_file, "\n").unwrap();
	match mkfile.get("DEPS_AS_ARGS")
	{
		None =>
		{
			println!("DEPS_AS_ARGS Not found");
		}
		Some(v) =>
		{
			write!(app_file, "DEPS_AS_ARGS:=").unwrap();
			writeln!(app_file, "{}", v.to_string()).unwrap();
		},
	}

	writeln!(app_file, "\nvpath %.c ../").unwrap();
	writeln!(app_file, "vpath %.s ../").unwrap();
	writeln!(app_file, "vpath %.S ../\n").unwrap();

	writeln!(app_file, ".PHONY: debug clean\n").unwrap();

	match mkfile.get("ALL_PREREQS")
	{
		None =>
		{
			println!("ALL_PREREQS Not found");
		}
		Some(v) =>
		{
			write!(app_file, "all:").unwrap();
			for cflag in v.clone().into_array().unwrap()
			{
				writeln!(app_file, "\\").unwrap();
				write!(app_file, "{}", cflag).unwrap();
			}
		},
	}
	match mkfile.get("ALL_CMDS")
	{
		None =>
		{
			println!("ALL_CMDS Not found");
		}
		Some(v) =>
		{
			write!(app_file, "\n\t").unwrap();
			for cflag in v.clone().into_array().unwrap()
			{
				writeln!(app_file, "\\").unwrap();
				write!(app_file, "\t{}", cflag).unwrap();
			}
		},
	}



	true
}